Mazda CX-9 Under Investigation for Brake Issues By Jason Siu Feb 14 2014 Share this Article Tweet The National Highway Traffic Safety Administration (NHTSA) has opened an investigation on the 2010-2011 Mazda CX-9 large crossover for a possible brake issue. Continue Reading... Filed under: Crossovers Family Sedans Featured Articles Japanese Mazda Safety SedansTags: cx-9, cx-9 brake issue, cx-9 investigation, Mazda, mazda cx-9, mazda cx-9 brake issue, national highway traffic safety administration, NHTSA